SIEM event data

Name: SIEM event data
Creator: TestPattern Community
License: https://opensource.org/licenses/MIT

Identifies siem event data patterns in security and access control contexts. Detects potential exposure of sensitive security information in Australian systems.

Type: regex
Engine: boost_regex
Confidence: medium
Confidence justification: structural regex with domain-specific anchors and constrained context replaces phrase-only marker.
Detection quality: Mixed
Jurisdictions: au
Regulations: NDB Scheme (Cth), SOCI Act 2018 (Cth), TIA Act 1979 (Cth)
Frameworks: CIS Controls, DISP, ISO 27001, NIST CSF, PCI-DSS, SOC 2
Data categories: credentials, security
Scope: wide
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Degraded, Netskope: Unsupported

Pattern

(?is)\b(?:siem\s+event\s+data|security\s+event|log\s+correlation|alert\s+rule|event\s+log|security\s+operations)\b

Corroborative evidence keywords

siem event data, siem, event, data, security, operations, threat

Proximity: 300 characters

Should match

siem event data — Primary topic phrase match
security event — Case-insensitive topic phrase match
log correlation — Alternative topic phrase match
alert rule — Additional topic phrase match

Should not match

unrelated generic text without domain phrases — No relevant topic phrases present
placeholder value 12345 — Random text should not match topic-specific regex
siem elastic — Generic word pair from old broad template should not match

Known false positives

Authentication-related terminology in software documentation, security training materials, or system architecture descriptions without actual credentials. Mitigation: Require proximity to credential-specific patterns (API keys, connection strings, tokens) rather than general security terminology.
Code snippets and configuration examples containing credential-related keywords or placeholder values in developer documentation. Mitigation: Check for common placeholder patterns (example.com, localhost, 0000) and documentation file types to reduce false positives from technical writing.

References

https://www.cyber.gov.au/resources-business-and-government/essential-cyber-security/ism
https://www.legislation.gov.au/C2018A00029/latest/text
https://www.oaic.gov.au/privacy/privacy-guidance-for-organisations-and-government-agencies/preventing-preparing-for-and-responding-to-data-breaches/data-breach-preparation-and-response
https://handbook.apra.gov.au/standard/cps-234